GCD of Polynomials by Feng Cheng Chang

Find polynomial GCD by "Leading-coefficient Elinimation" (linear algebra, polynomial gcd, euclid algorithm)

poly_gcd(p,q)

Multiple-root polynomial solved by partial fraction expansion by Feng Cheng Chang

To find poles/residues of the rational function, instead of roots/multiplicities of the polynomial (mathematics, communications, control design)

polyroots(p)

Polynomial coefficient vector derived from sub-polynomial factors by Feng Cheng Chang

A polynomial coefficient vector is derived from several powered polynomial factors. (linear algebra, polynomial roots, polynomial division)

polyget(A)